DL360 Gen9 E5-2620 v3 not maskable in Xenserver 6.5

[frod]

Hi, I wondered if anyone else had managed to get XenServer 6.5 masking their CPUs features with the DL360 Gen9? I just get:

cpu_count : 24
socket_count: 2
vendor: GenuineIntel
speed: 2397.298
modelname: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz
family: 6
model: 63
stepping: 2
flags: fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc rep_good nopl nonstop_tsc pni pclmulqdq monitor vmx est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes f16c rdrand hypervisor lahf_lm abm ida arat epb pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase bmi1 avx2 bmi2 erms
features: 77fefbff-bfebfbff-00000021-2c100800
features_after_reboot: 77fefbff-bfebfbff-00000021-2c100800
physical_features: 77fefbff-bfebfbff-00000021-2c100800
maskable: no

I've updated to the latest BIOS available as of today and disabled the c-states as far as I can tell to no avail.

Thanks in advance,

Kevin